how many volts should a car battery measure?
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How do you determine the amps and volts of a car battery? Battery Voltage : Normally a charged cell in rest is around 2.1 Volts which yields in 12.6 Volts for a charged battery at rest. When the battery is being charged by the car alternator the voltage will vary usually between 14 and 14.4 Volts.
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- When looking for a golf car battery first determine if you have a 36 volt or 48 volt vehicle. A 36 volt vehicle has six 6 volt batteries and a 48 volt vehicle has six 8 volt batteries or four 12 volt batteries. These are specialized Deep Cycle Lead Acid batteries designed for electric vehicle use.
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How to Wreck your Battery. Full discharge for a 12V lead-acid battery is 10V. When fully charged, a 12V battery will measure over 13.2V at the terminal. When the battery shows 10V at the terminal with no load, the manufacturer deems the battery fully discharged.
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- harging system problems often come to you as a no-start complaint. The battery will have discharged and the starter won't crank the engine. The first step is to test the battery and charge it if necessary (fig 1). No-Load Test Voltage Percent Charge 12.60V to 12.72V 12.45V 12.30V 12.15V 100% 75% 50% 25% Readings obtained at 80°F (27°C) Fig 1 - Measuring System Voltage Bleed the surface charge from the battery by turning on the headlights for a minute. Measure the voltage across the battery terminals with the lights off (see chart). When possible, individual cell specific gravity should be checked with a hydrometer. A load test should be done to indicate battery performance under load. Voltage tests
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- resting voltage ? What should the resting voltage of a 12v. car battery be , 2 hours after driving the car 8 miles ? I think when bought new , the voltage is 12.70 volts. What resting voltage would be a hint the batt. is about to fail , and should be replaced ?
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How many volts are in a car battery? Everyone says a car battery's voltage is 12 volts but it varies according to how full up it is with electrical charge. A fully-charged car battery in as-new condition can have a voltage of 12.6 volts when it is not delivering any load current. <br />Some import cars only carry a nominal six volts.It will read 12.6 volts with a digital volt meter if it is fully charge and the engine is not running.
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Lowest voltage I can still start my car? It's not 50/50. At 12.0 volts there's much less than a 50% chance that a known good battery will crank the engine over. Remember, 12.0 volts means 0% charge for a known good battery. At 11.0 volts, the chances of the battery actually cranking over the engine are very, very low.
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- With the engine at idle you should read from 13.5 to 15.5 volts at the battery if the alternator is good. 7 people found this useful. 1  Battery Drain and the iPod Touch The iPod Touch stands a well received piece of consumer electronics kit.
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- Video: How to Boost Charge. Video Transcript: Here we have a relatively brand new car battery, less than 1 year old. It should still be capable of starting a car but it was unfortunately left in a discharged state for too long. When we test the dead car battery with a multimeter, we get a reading of 6.8 Volts.
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INTRODUCTION At this point, you could charge the battery, remove the battery and have it tested (which is free at a car parts store) and if necessary replace it by a good one. Your car's volt gauge should read about 14 volts with the engine running. It should read at least 12 volts with the engine off. Bad diodes in the alternator can cause the battery to go dead when the car is off.   The diode bridge (six diodes) is directly connected to the battery, and is used t … o convert three phase delta AC from the alternator's stator to DC for the battery.
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- With most applications, the battery likes about 14.2 volts from the alternator and voltage regulator system, when driving. Since the system must operate at about 14volts, electrical parts are designed for best performance and longest life when operating at about 14 volts.
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When should I replace the car battery according to its CCA value? (See SAE J537 in Glossary.) A variety of battery testers have emerged that read CCA. Since current flow relates to ohmic value, most CCA testers measure the internal battery resistance. To test the CCA with a carbon pile, a battery that must have an SoC of 70 to 100 percent. It is then loaded with half the rated CCA for 15 seconds at a temperature of 10º C (50º F) and higher.
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- A measurement of 12.6 V indicates a battery with a 100% charge. In-between measurements indicate a charge of less than 100%. A battery with a slightly higher voltage measurement (3% to 5%) is much better than a battery with a lower measurement. A dc voltage variation below the normal rated voltage indicates a problem.
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How many volts are in a car battery? Everyone says a car battery's voltage is 12 volts but it varies according to how full up it is with electrical charge. A fully-charged car battery in as-new condition can ha … ve a voltage of 12.6 volts when it is not delivering any load current. Some import cars only carry a nominal six volts. It will read 12.6 volts with a digital volt meter if it is fully charge and the engine is not running. 12.4 at 75% charge.
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- To measure the car-off current draw, you'll need a multimeter capable of reading current, preferably one with a 10- or 20-amp capacity, but a 200 milliamp lower scale. You can find these for as little as 20 bucks.Start with a fully charged battery.Either make sure the doors are closed or wedge the door switch shut.o measure the car-off current draw, you'll need a multimeter capable of reading current, preferably one with a 10- or 20-amp capacity, but a 200 milliamp lower scale. You can find these for as little as 20 bucks. Start with a fully charged battery. Either make sure the doors are closed or wedge the door switch shut.
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Electric charge is measured in what?????????? When I charge up a battery on a car I use a 12 VOLT charger. I've been working as an Electrical/Electronic Engineer nearly my entire life and in all my years whenever I measure electricity I always measure it in volts, she asked how an electric charge is measured.
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Digital Multimeter Battery and Alternator Surprises! Set the multimeter dial to 20 DC Volts. Connect the red probe to the positive terminal and the black probe to the negative terminal. The reading should be above 9.6 Volts for a good battery, but a value between 11-12.7 signals a great battery.
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How many Volts, Watts, and Amps are in the Average Car Battery? A 550 amphour battery would only have 250 amps at 0 degrees temperature. Watts are amount of power used, and is figured by mulitplying the volts times the amps. So if a car is using 5 amps, at 12 volts, to run the headlights, it is using 60 watts of power. (5 x 12). But most people think of batteries as amps and volts only, hardly ever think of watts. Headlights are rated at watts, such as high beam 55 watts, low beam 35 watts.
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How to Test an Alternator With no battery in the circuit to act as a buffer, the alternator can put out up to 150 volts, depending on engine rpm. When the smoke clears, that “simple test” could end up costing you several thousand dollars for new electronics. Instead, get a cheap voltmeter (about $15 at any home center or auto parts store).
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- 12 volts nominal.   A 12 volt car lead-acid battery will measure about 12.2 at full charge and no load. Car charging systems usually keep the voltage around 14 when the car … is running, though it might drop down if accessories are in use (lights, heater fan, wipers). 14 people found this useful.
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How to Change a Car Battery Finally, you should check the alternator. Some cars also have a battery meter, with the engine running, the alternator usually maintains a charge close to 13.8 – 14.2 volts in a properly functioning charging system. The battery should have 12.4 – 12.8 volts with the engine off, and with no accessory load.
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Car Battery Do's and Don'ts Advertisement-Continue Reading Below. Car batteries store an enormous amount of energy, and they're optimized to deliver it in a very short period of time. A shorted car battery can easily deliver several hundred amps -- more than an arc-welding machine.
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- Video: How to Boost Charge. Here we have a relatively brand new car battery, less than 1 year old. It should still be capable of starting a car but it was unfortunately left in a discharged state for too long. When we test the dead car battery with a multimeter, we get a reading of 6.8 Volts.
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Meters and battery testers For a 0-15 volt meter for example, the standard linear scale D.C. voltmeter is shown in Figure 18-2a. In battery testing (12 volt), voltages below 10 or above 15 (8-16 are common) are of no par­ticular significance. In Figure 18-2a, the important voltage readings are on the upper third of the scale.